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Netgear CBR40



Modem Information

DOCSIS 3.0 32x8 Dual Band WiFi Modem

To achieve Gigablast or Ultimate Classic speeds, a DOCSIS 3.1 modem is required

Highest Service Level

Ultimate 500


Front View

Front View

Click to enlarge.

If the Power LED is not solid blue, check your power adapter connections.


Back View

Back View

Click to enlarge.


The Netgear CBR40 includes the following connection ports:

  • POWER - Connects the modem to the power adapter
  • RESET - Restores factory settings
  • ETHERNET - Provides internet access to a single device. Only one port is active at a time.
  • CABLE - Connects to coaxial cable


The lights indicate the current status of your cable modem. To troubleshoot any connection problems, use the table below.

Modem Light Status Problem

Power light
Solid White None. The modem is receiving power and is functioning normally.
Off The modem is not receiving power. Verify power supply connections and electrical outlet. Ensure the outlet is not connected to a switch.
Solid Red The modem is too warm and could overheat. Power off the modem, let it cool, and move it away from heat sources, such as a TV, DVD player, or speakers.

Internet light
Solid Blue None; the cable modem router is online.
Blinking Blue The modem is synchronizing with the cable provider's Cable Modem Termination System (CMTS).
Off Cable modem is offline. Verify all cable connections and try resetting the modem.

Upstream light
Solid Amber One upstream channel is locked.
Solid Blue Two or more upstream channels are locked.
Blinking Blue The modem is scaning for an upstream channel.
Off No upstream channel is locked.

downstream light
Solid Amber One downstream channel is locked.
Solid Blue Two or more downstream channels are locked.
Blinking Blue The modem is scanning for a downstream channel.
Off No downstream channel is locked.

Manufacturer Resources

For more detailed technical information on the CBR40, use the resources below from Netgear.

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